Improvement in presses



UNITED vSTATES PATENT OFFICE'.

DAVID DICK, OF MEADVILLE, PENNSYLVANIA.

IMPROVEMENT IN PRESSES.

Specification forming part of Letters Patent No. 5,856, dated October 17,1818.

T0 all whom it may concern:

Be it known that I, DAVID DICK, of Meadville, in the county of Crawford and State of.

Pennsylvania, have invented a new and useful machine, which I denominate the Eccentric Wheel and Sector Anti-Friction Press57 and I do hereby declare that the following is a full and exact'description o f the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification, in which- Figure l, Plate l, is a perspective View, and Fig. 2 is a side sectional view. Plate 2, Fig. l is a perspective of the same, with the attachment of a ratchet-piston with its accompaniments; and Plate 2, Fig. 2 is a side view of another method of operating the machine in connection with the ratchet-piston- A A, Plate l, Fig. l, are two eccentric wheels. B B B B are four sectors on which the axes of the eccentric wheels A A revolve. O is a center wheel placed between and in contact with the wheels A A. F is a follower on which the sectors B B have their bearing. D is a piston attached to the follower and surrounded by a helical spring. I is a cross bar through which the piston passes, and on which the helical spring presses. H is the frame inclosing all. l

When put in operation, the center wheel,G, is made to revolve by means of the lever K, which carries or causes the eccentric wheels to revolve right and left, and consequently, after having made one revolution, by virtue of their eccentricity, the follower, with its a tachment, is forced down the distance of the sum of the eccentricity'onv each of the wheels A A. After operation the helical spring at D forces or returns all the moving parts to their original position before operation.`

M M are two columns vsurrounded with helical springs, connecting the follower K with the follower F. P P are a pair of dogs or catches attached to the follower K, and R It are another pair of dogs or catches attached to vthe bar L. At the commencement of the op- F and K are again forced down-until the dogsv R B close into another pair of notches, and thus the operation proceeds until the piston has passed through the distance containing the notches. N is a movable double wedge which is situated between the two pairs of dogs, by which, when forced forward, the dogs are forced out of the notches of ythe piston to admit of its return.

Fig. 2, Plate 2, is avaried plan for operating the press in connection with the ratchetpiston, the advantage of which is that the press can be operated with a continuous motion (without rela-Xing at every pair of notches) until the piston has passed through the whole extent of it. Thus the axes of the wheelsA A bear on the periphery of the wheels B B, and the axes of the wheels B B bear upon the periphery of. the wheels C C, the axes of which bear on the face of the sectors D D. Thirtysix revolutions of the eccentric wheels A A produce six revolutions of thefpairs of wheels' sectors D D have changed their position the y length of their arc.

I do not claim the invention of the eccentric wheel, nor theinvention of the eccentric wheel to be put in motion by a roller revolving in contact with its periphery; but

The dogs R R Vhat I claim as my invention is A A with the friction-relieving sectors B B B l. The combination of the two eccentric B, Plate 1, all combined in the manner and Wheels A A with the center Wheel or roller, for the purposes herein set forth.

C, by which a double traverse of the follower v DAVID DICK. is produced by 1evo1ving:the one center Wheel Vitnesses: or roller, C. NVM. l?. ELLIOT,

2. The combination of the eccentric Wheels A. E. H. JOHNSON. 

